Process for the manufacture of alpha black coloring matter



. ample as follows PatentedAug. 26, 193i) UNITED STATES. wee q STEPHEN KISLITZIN, or soKoLNiKi, mosoowgiuniou AssIeNon To STATE IMPORT AND EXPOBT' TRADING orricn GGSflOBGJ! or Mos cow, Union on socIALisT V PROCESS roe THE MANUFACTURE No Drawing. Application filed November 28, 1928, Serial No. 322,571, and in the Republics June 23, 1926." i

This invention relates to the production of a black coloring matter.

he invention principally consists in a a process in which raw peat is first'treated with an aqueous or other solution of alkali or alkaline earth metal salt, particularly sodium salts, ammonium salts or ammonia, and with an aluminium salt, such as alum, or boron salt, such as boraX; then drying and submitting the product to destructive distillation,

' thereupon wet grinding the residue from the the wet mass with a min retort and treating acid under heat eral acid such as hydrochloric and lastly separating In carrying out the invention raw peat of ordinary consistency-.having183'87 per cent water is submitted to a chemical and technical refinement by an acqueous solution of aluminium and sodium salts. v

The process may be carried. out for ex- For about 3600 lbs-of raw peat, the following additional ingredients are used, 180 lbs.

common salt dissolved in water, which may consist of marsh-water, 1n proportlon of 36 lbs. of salt to 135 gallons of water. To this are added'lS lbs. aluminium salt such as alum or alum-earth. If the quality of soot is low, then potassium alums in water-solution of 18 lbs. alums in 67 to. gallons of Water may be used. i

The solution of potassium alums and the solution of common salt are to be mingled together in a barrel, vat or any other vessel an thoroughly mixed with the peat mass. The quality of the final product will be better 1f the peat mass is properly mixed together with the said solutions. After the treatment of the peat mass by means of the aqueoussolutions of aluminium and sodium salts, the product obtained is dried in the open air until it will contain the desired percentage of moisture in the same manner as peat is usually dried without any special methods. The turning, stowage in 5 and 50 piece columns, framings,

piling and stacking proceeds as at the producand drying the solid residue which constitutes the desired product.

quenched with water I quired fineness and SOVIET REPUBLiCS' or A LAGK COLQBTANGMAT'YIER it i and alums will be in this case much more hygroscopic. Y

on sociALisT .sovInT. BEPUBLICS, 7

Union ofsoei nst sovie After the air-drying has been effectedthe peat mass is passed through a disintegrating machine such as aWVolf-machine, where it is disintegrated into small pieces and transferred to cylinders in which it is mixed with gas bitumen and/or naphtha-residues or other tar substances in the proportion of 5 to 10 per cent gas bitumen. to retorts where it is heated without access of air to a suitable temperature.

The moment. of termination of the distillation is determined by the ceasing of evaporation of volatile products.

-The residue" obtained from mill and the ground then poured into vats and treated witha mirrerala-cid for instance hydrochloric acid and.

1n ecting steam therein boiled thoroughly by depending upon the reduring 2 to 4 hours 'quired quality. The foam formed during the steam treatment is removed.

After theprecipitate has been settle the water isvconveycd away by means of a siphon. the bottom, the black coloring matter can be removed for use in coloring and silicate works. The remaining mass is poured into other vats, where it is freed from acids and other, admixtures. I

After refinement the mass is conveyed into the filtering presses or into the vacuum or 1 other drying apparatus.

After drying the mass is rubbed to the repacking.

lfor special purposes in drum-mills, this method gives to the product particular downiness and lightness.

Having now-described my invention, what I claim as new and desire to secure by Letters Patent 1s 1. Process of manufacturing black ment which consists in treating raw .peat wlth an aqueous solution of an alkali metal salt and an aluminium salt, drying the peat thus treated, mixing the dry disintegrated peat with a bituminous material, destructively dis- It is then conveyed the retorts is and run into a colloid liquid .mass obtained is 1 allowed to the product is treated Then, by means-of a valve at then it is ready for the tilling the mixture obtained, Wet grinding the solid residue from the distillation, treating the wet masswith a mineral acid under heat, separating, washing and drying the mass which constitutes the desired product.

2. Process of manufacturing a black'pigment Which consists in treating raw peat with an aqueoussolutionof common salt and alum, .drying...the product, disintegrating and mixing the same With tar, destructively distilling the mixture obtained, Wet grinding the solid residue from the destructive distillation,

under heat, and separating, Washing, drying and grinding the mass which constitutes the desirediproduct.

In testimony whereof I have signed my nameto this specification. V

STEPHEN KISLITZIN.

treatingthewet mass With hydrochloric acid 

